<html>
  <body>
    <script src="../../../build/node_modules/react/umd/react.development.js"></script>
    <script src="../../../build/node_modules/react-dom/umd/react-dom.development.js"></script>
    <div id="container"></div>
    <script>
      ReactDOM.render(
        React.createElement('h1', null, 'Hello World!'),
        document.getElementById('container')
      );
    </script>
  </body>
</html>